Windows 10: Second monitor powers on and off every few seconds

I connected an LG IPS234 monitor to my wife's HP laptop using an HDMI conversion cable. When I first connected it it worked fine. But after my wife powered down and up the next day it stopped working and hasn't worked since. The power goes on and off every few seconds. Right before the power goes off the correct screen image flashes. So the laptop knows the monitor is there. I've set the power management for both devices to never sleep. I changed the driver to LG's but that didn't fix it. Another monitor works fine using the same cable when connected to the laptop. The monitor does the same thing when connected to my computer.
Looks like the monitor is the problem?

Laptop is an HP ProBook 6570b 64 bit, 16 gig memory, Intel Core i5-3360M processor with Intel graphics adapter.

:)

 

second monitor

Hi Pauline,

Some of the advantages of having multiple screens (dual monitor) are it increases your productivity or it allows you to do multitasking. When awaking your PC after putting it to sleep, it will be directed at the sign in page. Normally,
the second monitor will just reflect black screen and the main monitor will reflect the sign in page. After signing in, your second monitor will automatically open if it is turned on.

If the second monitor doesn’t turn on, we recommend that you run the Power troubleshooter by following these steps:

• Click the Start button, then type Control Panel and then press
  Enter.
• Change the View by option on the top-right to Large icons.
• Click on Troubleshooting, and click on the View all option on the left pane.
• Run the Power troubleshooter.

If the issue persists, kindly refer to the resolution provided by
breadbox88 in this
thread and check if it will help you with the issue.

Let us know how it goes.

 

Second Monitor

Hi David,



Some of the advantages of having multiple screens (dual monitor) are it increases your productivity or it allows you to do multitasking. When awaking your PC after putting it to sleep, it will be directed at the sign in page. Normally,
the second monitor will just reflect black screen and the main monitor will reflect the sign in page. After signing in, your second monitor will automatically open if it is turned on.



If the second monitor doesn’t turn on, we recommend that you run the
Power troubleshooter by following these steps:

• Click the Start button, then type Control Panel and then press Enter.
• Change the View by option on the top-right to Large icons.
• Click on Troubleshooting, and click on the View all option on the left pane.
• Run the Power troubleshooter.

If the issue persists, kindly refer to the resolution provided by breadbox88 in this thread and
check if it will help you with the issue.



Update us with the outcome.

 

Second monitor not detected after update

Hi Tom,

There are several reasons that could have caused the issue you are experiencing. One of these is the update you previously performed in Windows, either it was not configured properly by the system or the update components were corrupted. Kindly answer the
following questions for clarification:

• Have you tried updating the monitor and display drivers?
• Have you tried to use another user profile to check if the issue re-occurs?

Furthermore, we suggest that you add the other monitor manually. This is to ensure that the second monitor is still connected after the update. Here are the steps:

• Type connected devices and open Connected Devices on the
  Windows Search bar.
• Click Add devices.
• Select the Second screen.
• Pick one of the 3 options: Duplicate, Extend, and the Second screen only.
• The Duplicate option will duplicate the primary display to secondary display.
• The Extend option will unite two monitors so you can use them both as one.
• The Second screen only option will, obviously, disable primary and use only the secondary monitor.
• Once you’ve chosen the preferred mode, save changes.

We're looking forward to your response.